Partial Braces in Ukraine

With partial braces, brackets are bonded to one segment of the dental arch rather than to the whole arch. The most common option is known as the 2×4 technique: four brackets on the permanent incisors, two tubes or bands on the first permanent molars and a thin archwire between them. The wire simply bridges the area where baby teeth are still in place or where there is no tooth at all.

This approach was developed specifically for the mixed dentition. At 7–10 years of age the incisors and first molars have already erupted, but the canines and premolars have not, so there is simply nothing to fit full braces to. Waiting for all the permanent teeth is not always an option: some problems do not resolve with time but become established, and correcting them at 13 takes longer and is more difficult.

The indications are narrow and specific. They include an anterior crossbite, where a lower incisor sits in front of the upper one; an incisor that has erupted on the palatal side; a diastema to be closed before frenuloplasty; marked rotation or tipping of a single tooth. The most common reason, however, is a lack of space for a permanent tooth that physically has nowhere to erupt.

Moving the molars back (distalisation) is a separate task. If the upper first molar has drifted forward after the early loss of a baby tooth, the arch becomes shorter and there is no room left for the canine or premolar. The molars are then moved back with a fixed appliance such as the Distal jet, while the brackets on the incisors hold and align the front teeth.

In adults, segmental braces are used mainly before prosthetic work: to upright a molar that has tipped into the space of a tooth extracted long ago, to create space for an implant between roots that have moved closer together, or to slowly extrude the root of a broken-down tooth so that it can be restored with a crown. In these cases brackets go on three or four teeth for 4–8 months.

Partial braces are not suitable when the problem lies in the bite as a whole: with a distal, deep or open bite, crowding across the whole arch or a marked mismatch in jaw size, treating one segment will not solve it. MediUkraine is a treatment search and coordination service, not a clinic: we select the clinic and the orthodontist, arrange the dates and support you throughout, while the treatment method is chosen by the doctor after an in-person examination.

The 2×4 technique is the basic form of segmental braces in the mixed dentition. Brackets are bonded to the four permanent incisors, bands with tubes or bonded tubes are placed on the first permanent molars, and an archwire runs between them. Treatment starts with a thin nickel-titanium wire, about 0.014 inch thick: it is flexible, applies a light continuous force and aligns the incisors in 2–4 months. After that, stiffer steel wires are used, which hold the shape of the arch and provide anchorage for the remaining movements.

The options differ in the number of teeth included. Besides 2×4, there is a 2×6 set-up, which adds erupted premolars to the incisors and molars, as well as true segmental archwires: a short, stiff wire on two to four teeth that works as a lever. Brackets are mostly metal: in children they are more reliable than ceramic ones, cheaper to rebond and do not chip. Ceramic and sapphire brackets are used mainly in adults, on visible teeth.

Opening space for a permanent tooth is one of the main tasks. An open nickel-titanium coil spring is placed along the wire between neighbouring teeth, and it gradually pushes them apart, freeing 2–4 mm over a few months. This is done when a lateral incisor or a canine has nowhere to erupt, and also when a tooth has already erupted outside the arch. If the tooth is still in the bone, a space maintainer is fitted after the space has been opened, otherwise the gap will close again.

The Distal jet is a fixed appliance for distal movement of the upper molars. It consists of an acrylic Nance button on the palate, supporting arms to the premolars or baby molars, and two guide tubes with nickel-titanium springs that push the first molars back. There is nothing for the patient to take out or put in: the appliance works around the clock, which is what mainly sets it apart from headgear. The molars can usually be moved back by 2–4 mm in 4–7 months; the appliance is fitted on one side or on both, depending on where arch length has been lost.

The trade-off with distalisation is anchorage loss. The spring pushes the molar back, but it pushes the anchor teeth forward with equal force: the premolars move mesially, the incisors tip forward and the overbite decreases. The Nance button on the palate limits this but does not eliminate it. That is why distalisation is almost always planned as a first stage, after which the result has to be consolidated by work on the rest of the arch.

There are alternatives, and choosing between them is not about price. Mini-screws (orthodontic micro-implants) about 1.5 mm in diameter are placed in the bone to provide skeletal anchorage, so the incisors do not move forward. The pendulum appliance works on a similar principle to the Distal jet, but tilts the molar crowns more. Headgear gives good control but has to be worn for 12–14 hours a day, and with teenagers this is what most often derails the plan.

Bringing an impacted tooth into the arch is a separate scenario, with the partial archwire serving as anchorage. The surgeon exposes the crown of the impacted tooth and bonds a button with a chain to it, and the orthodontist pulls the tooth towards the wire with elastic traction. Upper canines are the teeth most often brought down this way. The process is slow: 6–12 months, sometimes longer, and the result depends on the starting position of the tooth, its angulation and the patient's age.

In adults, segmental braces are most often used to prepare for prosthetic work. A molar that has tipped into the space of a long-lost neighbour is uprighted over 4–8 months, and only then is an implant or crown placed; otherwise the abutment axis would be wrong and the load uneven. In the same way, space is created between roots that have converged over the site of an extracted tooth: without this an implant simply will not fit. Another option is slow orthodontic extrusion of a root when the damage extends below the gum and has to be brought up to create a proper margin for a crown.

Now for the most common misconception. Treating one segment costs less than full treatment, which creates the impression that it can replace full braces. In reality it solves one problem in one area and does not control the bite: aligned incisors may start to contact the lower ones prematurely, and the cause of crowding, lack of space in the arch, remains. With genuine crowding, the so-called "social six" approach, with brackets only on the front teeth for a quick cosmetic result, leads to flared incisors, gum recession and the crowding returning within a year or two.

Patients also often compare this with a removable plate. A plate with an expansion screw is cheaper and can be taken out, but it tips the crown rather than moving the whole tooth with its root, and it only works for as many hours as it is actually worn. A fixed appliance moves teeth in a controlled way, including the root angle, and does not depend on the patient's discipline. At the same time, some children will still need full braces in the permanent dentition after the first phase: this is not a planning error but an expected scenario that the doctor should mention at the start.

For the first 3–5 days the teeth are sore when biting: this is a normal reaction to the start of tooth movement, not a complication. Soft food, cool drinks and, if needed, an over-the-counter painkiller at an age-appropriate dose help. In the first days the brackets rub the inside of the cheeks and lips, so keep orthodontic wax to hand from day one.

Speech changes little, because there are few brackets in the segment, but hygiene becomes noticeably harder. Brushing takes 5–7 minutes, interdental brushes and a single-tuft toothbrush are needed, and ordinary floss is replaced with Superfloss or a water flosser. This is not just a recommendation: demineralisation of the enamel around the brackets begins after just a few weeks of poor care.

The first visible changes appear quickly. A rotated incisor noticeably changes position in 4–8 weeks, and a crossbite of a single tooth is usually corrected in 2–4 months. Complete alignment of the segment takes from 4 to 12 months, distal movement of the molars 4–7 months, and bringing an impacted canine into the arch 6–12 months or more.

Timelines depend on age, bone density, the starting position of the teeth and how precisely instructions are followed: elastics worn less than prescribed can double the length of treatment. Only a doctor can predict the result for an individual patient, after an examination, and even then timelines are given as a range rather than a date.

Judging the result by eye is not enough: a follow-up X-ray is needed. After distalisation a repeat panoramic X-ray is taken to see the actual position of the molars and how the developing permanent teeth have responded. After space has been opened, the doctor checks whether the tooth is erupting into the gap created and whether surgical help is needed.

Retention after the brackets are removed is essential. In the mixed dentition this is most often a space maintainer or a removable plate worn at night; in adults, a fixed wire bonded behind the teeth. Without retention the teeth return to their previous position, and this happens fastest in the first months. If a second phase with full braces is needed later, the retainer is removed immediately before it.